While I do agree that a couple changes are needed to the tanking aspects of the game, I also think the way it is now is good enough to keep enmity on something (If done correctly). I do agree the stamina bar consumption from some skills on Gladiator do take too much. The best advice I can give is simply tank the monster you are fighting to maximize enmity and damage mitagation, and do not worry about your damage at all. I know in FFXI Paladins and Ninjas (And warriors as well) could damage deal to gain more enmity, but in FFXIV you have to worry about enmity boosting tactics and skills and not damage.

It will take some time to adjust the two different play styles, but you will get used of it.

~Tak